Add link to federated login in login page
ws
Add file describing code & commit msg conventions

(cherry-picked from acgh branch)
SAML Login: Auto-create inexistent users

Added config options:
org.transmart.security.saml.createInexistentUsers
	"true" (string, not bool) to activate the feature
org.transmart.security.saml.attribute.username
org.transmart.security.saml.attribute.firstName
org.transmart.security.saml.attribute.lastName
org.transmart.security.saml.attribute.email
	The attribute names to be searched in the assertion in order to get
	the data with which to fill the new userʼs details